{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["concept or principle", "engineering feature", "biomedical", "material", "enabling technology", "application"], "input": "Results showed that the aB-built condition formed a layered structure with alternating layers of δ-ferrite and martensite , which resulted in anisotropic engineering and true-stress , true-strain mechanical performance ."}
{"concept or principle": ["layered structure"], "engineering feature": [], "biomedical": [], "material": ["martensite"], "enabling technology": [], "application": ["mechanical"]}